of philadelphia



No. 750,182. PATENTED JAN. 19, 1904.

- z. FURBISH;

REVERSIBLE SCREW DRIVER.

APPLICATION FILED APR. 17. 1902;

no MODEL.

UNITED STAT S Patented January 19, 1904.

PATENT OFFICE.

ZACHRY T. FURBISH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR- TO- NORTHBROTHERS MANUFACTURING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, ACORPORATION OF PENNSYLVANIA.

REVERSIBLE SCREW-DRIVER.

SPECIFICATION forming part of Letters Patent No. 750,182, dated January19, 1904.

Application filed April 17, 1902.

Improvements in Reversible Screw-Drivers,.

of which the following is a specification.

My invention relates to certain improvemerits in reversiblescrew-drivers.

The object of my invention is to so construct a screw-driver of thistype that it will be compact, substantial, and can be held rigidly ineither position when in use. This object I attain in the followingmanner, reference being had to the accompanying drawings, in whichFigure l is a side view of my improved screw-driver. Fig. 2 is a viewshowing the carrier extended. Fig. 3 is a sectional view. Fig. 4 is aperspective view showing the parts detached. Figs. 5 and 6 are views ofmodifications of the blade, and Fig. 7 is a perspective view of thekey-plate.

A is the handle of the screw-driver, made of wood or other material.

B is a shell of metal which is driven into the 2 5 handle and is heldfrom turning by a key-plate a, which enters slots Z) in the end of theshell B. This key-plate is pointed at each end and has a shoulder. Oneend is driven into the handle A and the other acts as a spreader for 3the end of the shell, so as to prevent it from being withdrawn. Arrangedto slide within the shell is a carrier D. Fig. 4.) This carrier has agroove d at one side, and passing into this groove is a pin I),

preferably in the form of a screw. This pin allows the carrier to slidein and out in the shell and yet will prevent it turning independently ofthe shell;

E is the double-ended blade of the screw- 4 driver, having at one end anarrow portion a and at the other end a wide portion 6'. The

carrier D is slotted at d for the reception of one-half of this blade E,and the pivot-pin 6 passes through the carrier and through a centralhole in the blade and acts as a pivot for the blade, so that it can beturned either to project the narrow end a or the wide end 0. When theparts are in the position shown in (Shown in detail in Serial 1%.103,379. (No niodel.)

" head D of the carrier, so that when. the screwdriver is turned thestrain is taken off the screw 6. In order to retain the carrier in theclosed position, as in Figs. 1 and 3, I mount in a socket c in thecarrier B a ball or other suitable bolt O, back of which is a spring 0,which tends to force the bolt out, and in the shell B within the handleis a hole f, into which the ball can project when in the position shownin Fig. 3. The ball and cavity are so formed that by a little efiort thecarrier can be extended so as to turn the blade; but under ordinaryconditions it will hold the carrier in its closed position. If the partsare in the position shown in Fig. 1 and it is wished to reverse theblade, all that is necessary is to pull hard upon the blade, so as torelease the ball-boltO and extend the carrier as in Fig. 2. When thecarrier is in this position, the blade can be reversed by simply turningit on its pivot, and the carrier is then pushed back in its shell andthe ball-bolt will lock it to the s e When the screw-driver is in use,the strain is taken by the tongue 6 as mentioned above.

This construction makes a very compact screw-driver which can be cheaplymanufac tured and which will be substantial.

. .While I have shown in Figs. 2 and 4 a blade.

having a screw-driver at each end, a single blade may be used, asshownin Fig. 5, so that the tool can be used as a pocket screw-driver, or theblade may be formed as shown in Fig. 6, one end of which is in the formof a screwdriver and the other in the form of a drill.

It will be understood that the blade may be modified without departingfrom the main feature of my invention.

I claim as my invention- 1. The combination in a reversible tool, of ahandle, a shell secured to the handle, a carrier within the shell, adouble blade pivoted to the carrier, a head on the outer end of thecarrier, said head being slotted, a tongue on the end of the shellarranged to enter the slot, and

a friction-bolt for retaining the carrier in its closed position,substantially as described.

2. The combination in a reversible tool, of a handle, a shell secured tothe handle, a carrier arranged to slide Within the shell, said carrierbeing slotted from the outer end, a blade pivoted to the carrier andarranged to turn in the slot, a head on the end of the carrier, saidslot being cut through the head, tongues on the end of the shellentering the slot beyond the blade, and a friction-bolt tending to keepthe carrier in its closed position, the tongues preventing the carriermoving in the shell, su bstantially as described.

3. The combination in a reversible tool, of a handle, a shell secured tothe handle, tongues on the outer endof the shell, a carrier arranged tomove in the shell and having a head at its outer end, said carrier beingslotted, the

slot in the head being enlarged, a double-ended blade pivoted to theouter end of the carrier, the tongues on the end of the shell enteringthe enlarged slots in the head when the tool is closed, a spring-pressedball mounted in the carrier and arranged to enter a hole in the shell soas to frictionally hold the carrier in its closed position,substantially as described.

4. The combination of a handle, a slotted shell Within the handle, akey-plate having each end tapered and having a shoulder, substantia-llyas described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

ZACHRY T. FURBISH. Witnesses WILL. A. BARR, Jos. I-I. KLEIN.

